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How to use χ2 test correctly——χ2 distribution and the related contents
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the χ2 distribution and related contents， including χ2 distribution and non-central χ2 distribution. It focused on showing the definition of two χ2 distributions， the graph and the main properties of the ...
Hu Chunyan, Hu Liangping
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Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the likelihood ratio test， six nonparametric tests， and the SAS implementation of the survival data. Based on the assumption that the survival data had the exponential distribution， the likelihood ratio test ...
Hu Chunyan, Hu Liangping
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How to use χ2 test correctly——the Wald΄s test and the implementation of SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the Wald΄s test and the SAS implementation. The specific contents involved the following nine aspects， namely the general Wald΄s test，the robust Wald΄s test，the constrained Wald΄s χ2 test，the generalized Wald ...
Hu Chunyan, Hu Liangping
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How to use χ2 test correctly——the likelihood ratio test and the implementation of SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the likelihood ratio test and the SAS implementation. Specifically， three definitions of the likelihood ratio test statistics and six more commonly used likelihood ratio test statistics were introduced.
Hu Chunyan, Hu Liangping
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Sichuan jingshen weisheng, 2021 The purpose of the paper was to introduce the three special tests of the survival data and the SAS implementation. Specifically， it was the multiple comparisons， the trend test and the covariate test of the survival data.
Hu Chunyan, Hu Liangping
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How to use χ2 test correctly——the score test and the implementation of SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the score test and the SAS implementation. Concretely， there were five common forms of the score test statistics， namely the general score test statistic，the robust score test statistic，the residual score test
Hu Chunyan, Hu Liangping
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Spatial utilization predicts animal social contact networks are not scale-free [PDF]
Royal Society Open Science, 2017 While heterogeneity in social behaviour has been described in many human contexts it is often assumed to be less common in the animal kingdom even though scale-free networks are observed.
Alex James +4 more
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How to use χ2 test correctly——the rank sum tests and the implementation of the SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the rank sum test and its SAS implementation. The concrete contents included the following three aspects： ①the simple linear rank test of two-sample data， ②the one-way ANOVA rank sum test of the multi-sample ...
Hu Chunyan, Hu Liangping
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How to use χ2 test correctly—— the goodness of fit tests and the implementation of the SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the goodness of fit test and its SAS implementation. The main contents included the following four aspects： ① Pearson΄s goodness of fit test； ② deviance or likelihood ratio goodness of fit test； ③ Hosmer ...
Hu Chunyan, Hu Liangping
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How to use χ2 test correctly——the log-rank test and the implementation of SAS software
Sichuan jingshen weisheng, 2021 The purpose of this article was to introduce the log-rank test and the SAS implementation. There were many different expression forms for the test statistics of the log-rank tests.
Hu Chunyan, Hu Liangping
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